--- /dev/null
+/* ====================================================================
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2000 The Apache Software Foundation. All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ * if any, must include the following acknowledgment:
+ * "This product includes software developed by the
+ * Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowledgment may appear in the software itself,
+ * if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Apache" and "Apache Software Foundation" must
+ * not be used to endorse or promote products derived from this
+ * software without prior written permission. For written
+ * permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache",
+ * nor may "Apache" appear in their name, without prior written
+ * permission of the Apache Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation. For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ * Portions of this software are based upon public domain software
+ * originally written at the National Center for Supercomputing Applications,
+ * University of Illinois, Urbana-Champaign.
+ */
+
+/* The new BeOS MPM!
+ *
+ * This one basically is a single process multi threaded model, but
+ * I couldn't be bothered adding the spmt_ to the front of the name!
+ * Anyway, this is still under development so it isn't yet the default
+ * choice.
+ */
+
+#define CORE_PRIVATE
+
+#include "apr_portable.h"
+#include "httpd.h"
+#include "http_main.h"
+#include "http_log.h"
+#include "http_config.h" /* for read_config */
+#include "http_core.h" /* for get_remote_host */
+#include "http_connection.h"
+#include "ap_mpm.h"
+#include "beosd.h"
+#include "iol_socket.h"
+#include "ap_listen.h"
+#include "scoreboard.h"
+//#include "poll.h"
+#include "mpm_common.h"
+#include "mpm.h"
+#include <unistd.h>
+#include <sys/socket.h>
+
+/*
+ * Actual definitions of config globals
+ */
+
+int ap_threads_per_child=0; /* Worker threads per child */
+int ap_max_requests_per_child=0;
+static char *ap_pid_fname=NULL;
+static char *ap_scoreboard_fname=NULL;
+static int ap_threads_to_start=0;
+static int min_spare_threads=0;
+static int max_spare_threads=0;
+static int ap_thread_limit=0;
+static time_t ap_restart_time=0;
+API_VAR_EXPORT int ap_extended_status = 0;
+static int num_listening_sockets = 0; /* set by open_listeners in ap_mpm_run */
+static ap_socket_t ** listening_sockets;
+ap_lock_t *accept_mutex = NULL;
+
+static ap_pool_t *pconf; /* Pool for config stuff */
+static ap_pool_t *pchild; /* Pool for httpd child stuff */
+
+static int server_pid;
+
+/* Keep track of the number of worker threads currently active */
+static int worker_thread_count;
+ap_lock_t *worker_thread_count_mutex;
+
+/* The structure used to pass unique initialization info to each thread */
+typedef struct {
+ int slot;
+ ap_pool_t *tpool;
+} proc_info;
+
+struct ap_ctable ap_child_table[HARD_SERVER_LIMIT];
+
+/*
+ * The max child slot ever assigned, preserved across restarts. Necessary
+ * to deal with MaxClients changes across SIGWINCH restarts. We use this
+ * value to optimize routines that have to scan the entire scoreboard.
+ */
+int ap_max_child_assigned = -1;
+int ap_max_threads_limit = -1;
+static char ap_coredump_dir[MAX_STRING_LEN];
+
+/* shared http_main globals... */
+
+server_rec *ap_server_conf;
+
+/* one_process */
+/* TODO - get this working again... */
+static int one_process = 0;
+
+#ifdef DEBUG_SIGSTOP
+int raise_sigstop_flags;
+#endif
+
+API_EXPORT(const server_rec *) ap_get_server_conf(void)
+{
+ return (ap_server_conf);
+}
+
+API_EXPORT(int) ap_get_max_daemons(void)
+{
+ return ap_max_child_assigned;
+}
+
+/* a clean exit from a child with proper cleanup
+ static void clean_child_exit(int code) __attribute__ ((noreturn)); */
+void clean_child_exit(int code)
+{
+ if (pchild)
+ ap_destroy_pool(pchild);
+ exit(code);
+}
+
+/* handle all varieties of core dumping signals */
+static void sig_coredump(int sig)
+{
+ chdir(ap_coredump_dir);
+ signal(sig, SIG_DFL);
+ kill(server_pid, sig);
+ /* At this point we've got sig blocked, because we're still inside
+ * the signal handler. When we leave the signal handler it will
+ * be unblocked, and we'll take the signal... and coredump or whatever
+ * is appropriate for this particular Unix. In addition the parent
+ * will see the real signal we received -- whereas if we called
+ * abort() here, the parent would only see SIGABRT.
+ */
+}
+
+/*****************************************************************
+ * Connection structures and accounting...
+ */
+
+/* volatile just in case */
+static int volatile shutdown_pending;
+static int volatile restart_pending;
+static int volatile is_graceful;
+
+/*
+ * ap_start_shutdown() and ap_start_restart(), below, are a first stab at
+ * functions to initiate shutdown or restart without relying on signals.
+ * Previously this was initiated in sig_term() and restart() signal handlers,
+ * but we want to be able to start a shutdown/restart from other sources --
+ * e.g. on Win32, from the service manager. Now the service manager can
+ * call ap_start_shutdown() or ap_start_restart() as appropiate. Note that
+ * these functions can also be called by the child processes, since global
+ * variables are no longer used to pass on the required action to the parent.
+ *
+ * These should only be called from the parent process itself, since the
+ * parent process will use the shutdown_pending and restart_pending variables
+ * to determine whether to shutdown or restart. The child process should
+ * call signal_parent() directly to tell the parent to die -- this will
+ * cause neither of those variable to be set, which the parent will
+ * assume means something serious is wrong (which it will be, for the
+ * child to force an exit) and so do an exit anyway.
+ */
+
+void ap_start_shutdown(void)
+{
+ if (shutdown_pending == 1) {
+ /* Um, is this _probably_ not an error, if the user has
+ * tried to do a shutdown twice quickly, so we won't
+ * worry about reporting it.
+ */
+ return;
+ }
+ shutdown_pending = 1;
+}
+
+/* do a graceful restart if graceful == 1 */
+void ap_start_restart(int graceful)
+{
+
+ if (restart_pending == 1) {
+ /* Probably not an error - don't bother reporting it */
+ return;
+ }
+ restart_pending = 1;
+ is_graceful = graceful;
+}
+
+static void sig_term(int sig)
+{
+ ap_start_shutdown();
+}
+
+static void restart(int sig)
+{
+ ap_start_restart(sig == SIGWINCH);
+}
+
+static void tell_workers_to_exit()
+{
+ int i, code = 99;
+
+ for (i=0;i<ap_max_child_assigned;i++) {
+ if (ap_child_table[i].status != SERVER_DEAD)
+ send_data(ap_child_table[i].pid, code, NULL, 0);
+
+ }
+}
+
+static void push_workers_off_cliff(int sig)
+{
+ int i;
+
+ for (i=0;i<ap_max_child_assigned;i++)
+ kill(ap_child_table[i].pid, sig);
+}
+
+static void set_signals(void)
+{
+ struct sigaction sa;
+
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = 0;
+
+ if (!one_process) {
+ sa.sa_handler = sig_coredump;
+
+ if (sigaction(SIGSEGV, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGSEGV)");
+ if (sigaction(SIGBUS, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGBUS)");
+ if (sigaction(SIGABRT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGABRT)");
+ if (sigaction(SIGILL, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGILL)");
+ sa.sa_flags = 0;
+ }
+ sa.sa_handler = sig_term;
+ if (sigaction(SIGTERM, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)");
+ if (sigaction(SIGINT, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)");
+
+ sa.sa_handler = SIG_IGN;
+ if (sigaction(SIGPIPE, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGPIPE)");
+
+ /* we want to ignore HUPs and WINCH while we're busy processing one */
+ sigaddset(&sa.sa_mask, SIGHUP);
+ sigaddset(&sa.sa_mask, SIGWINCH);
+ sa.sa_handler = restart;
+ if (sigaction(SIGHUP, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)");
+ if (sigaction(SIGWINCH, &sa, NULL) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGWINCH)");
+}
+
+static void process_child_status(int pid, ap_wait_t status)
+{
+ /* Child died... if it died due to a fatal error,
+ * we should simply bail out.
+ */
+ if ((WIFEXITED(status)) &&
+ WEXITSTATUS(status) == APEXIT_CHILDFATAL) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, errno, ap_server_conf,
+ "Child %d returned a Fatal error... \n"
+ "Apache is exiting!",
+ pid);
+ exit(APEXIT_CHILDFATAL);
+ }
+ if (WIFSIGNALED(status)) {
+ switch (WTERMSIG(status)) {
+ case SIGTERM:
+ case SIGHUP:
+ case SIGUSR1:
+ case SIGKILL:
+ break;
+ default:
+#ifdef SYS_SIGLIST
+#ifdef WCOREDUMP
+ if (WCOREDUMP(status)) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ errno, ap_server_conf,
+ "child pid %d exit signal %s (%d), "
+ "possible coredump in %s",
+ pid, (WTERMSIG(status) >= NumSIG) ? "" :
+ SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status),
+ ap_coredump_dir);
+ }
+ else {
+#endif
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ errno, ap_server_conf,
+ "child pid %d exit signal %s (%d)", pid,
+ SYS_SIGLIST[WTERMSIG(status)], WTERMSIG(status));
+#ifdef WCOREDUMP
+ }
+#endif
+#else
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE,
+ errno, ap_server_conf,
+ "child pid %d exit signal %d",
+ pid, WTERMSIG(status));
+#endif
+ }
+ }
+}
+
+static int setup_listeners(server_rec *s)
+{
+ ap_listen_rec *lr;
+ int num_listeners = 0;
+ if (ap_listen_open(s->process, s->port)) {
+ return 0;
+ }
+ for (lr = ap_listeners; lr; lr = lr->next) {
+ num_listeners++;
+ }
+ return num_listeners;
+}
+
+/*****************************************************************
+ * Here follows a long bunch of generic server bookkeeping stuff...
+ */
+
+//#define sock_disable_nagle(s) /* NOOP */
+
+int ap_graceful_stop_signalled(void)
+{
+ /* XXX - Does this really work? - Manoj */
+ return is_graceful;
+}
+
+/*****************************************************************
+ * Child process main loop.
+ */
+
+static void process_socket(ap_pool_t *p, ap_socket_t *sock, int my_child_num)
+{
+ BUFF *conn_io;
+ conn_rec *current_conn;
+ ap_iol *iol;
+ long conn_id = my_child_num;
+ int csd;
+
+ iol = beos_attach_socket(sock);
+ if (iol == NULL) {
+ if (errno == EBADF) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, NULL,
+ "filedescriptor (%u) larger than FD_SETSIZE (%u) "
+ "found, you probably need to rebuild Apache with a "
+ "larger FD_SETSIZE", csd, FD_SETSIZE);
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, NULL,
+ "error attaching to socket");
+ }
+ ap_close_socket(sock);
+ return;
+ }
+
+ conn_io = ap_bcreate(p, B_RDWR);
+ ap_bpush_iol(conn_io, iol);
+
+ current_conn = ap_new_apr_connection(p, ap_server_conf, conn_io, sock,
+ conn_id);
+
+ ap_process_connection(current_conn);
+ ap_lingering_close(current_conn);
+}
+
+static int32 worker_thread(void * dummy)
+{
+ proc_info * ti = dummy;
+ int child_slot = ti->slot;
+ ap_pool_t *tpool = ti->tpool;
+ ap_socket_t *csd = NULL;
+ ap_pool_t *ptrans; /* Pool for per-transaction stuff */
+ ap_socket_t *sd = NULL;
+ int srv , n;
+ int curr_pollfd, last_pollfd = 0;
+ sigset_t sig_mask;
+ int requests_this_child = ap_max_requests_per_child;
+ ap_pollfd_t *pollset;
+ /* each worker thread is in control of it's own destiny...*/
+ int this_worker_should_exit = 0;
+ thread_id me = find_thread(NULL);
+
+ free(ti);
+
+ /* block the signals for this thread */
+ sigfillset(&sig_mask);
+ sigprocmask(SIG_BLOCK, &sig_mask, NULL);
+
+ ap_create_pool(&ptrans, tpool);
+
+ ap_lock(worker_thread_count_mutex);
+ worker_thread_count++;
+ ap_unlock(worker_thread_count_mutex);
+
+ /* now setup our own pollset...this will use APR woohoo! */
+ ap_setup_poll(&pollset, num_listening_sockets, tpool);
+ for(n=0 ; n < num_listening_sockets ; ++n)
+ ap_add_poll_socket(pollset, listening_sockets[n], APR_POLLIN);
+
+ while (!this_worker_should_exit) {
+ this_worker_should_exit |= (ap_max_requests_per_child != 0) && (requests_this_child <= 0);
+
+ if (this_worker_should_exit) break;
+
+ ap_lock(accept_mutex);
+ while (!this_worker_should_exit) {
+ ap_int16_t event;
+ ap_status_t ret = ap_poll(pollset, &srv, -1);
+
+ if (has_data(me)) {
+ thread_id sender;
+ receive_data(&sender, NULL, 0);
+ this_worker_should_exit = 1;
+ }
+ if (ret != APR_SUCCESS) {
+ if (errno == EINTR) {
+ continue;
+ }
+
+ /* poll() will only return errors in catastrophic
+ * circumstances. Let's try exiting gracefully, for now. */
+ ap_log_error(APLOG_MARK, APLOG_ERR,errno, (const server_rec *)
+ ap_get_server_conf(), "poll: (listen)");
+ this_worker_should_exit = 1;
+ }
+
+ if (this_worker_should_exit) break;
+
+ if (num_listening_sockets == 1) {
+ sd = ap_listeners->sd;
+ goto got_fd;
+ }
+ else {
+ /* find a listener */
+ curr_pollfd = last_pollfd;
+ do {
+ curr_pollfd++;
+ if (curr_pollfd > num_listening_sockets) {
+ curr_pollfd = 1;
+ }
+ /* Get the revent... */
+ ap_get_revents(&event, listening_sockets[curr_pollfd], pollset);
+
+ /* XXX: Should we check for POLLERR? */
+ if (event & APR_POLLIN) {
+ last_pollfd = curr_pollfd;
+ sd = listening_sockets[curr_pollfd];
+ goto got_fd;
+ }
+ } while (curr_pollfd != last_pollfd);
+ }
+ }
+ got_fd:
+ if (!this_worker_should_exit) {
+ ap_accept(&csd, sd, ptrans);
+ ap_unlock(accept_mutex);
+ process_socket(ptrans, csd, child_slot);
+ requests_this_child--;
+ }
+ else {
+ ap_unlock(accept_mutex);
+ break;
+ }
+ ap_clear_pool(ptrans);
+ }
+
+ ap_destroy_pool(tpool);
+ ap_lock(worker_thread_count_mutex);
+ worker_thread_count--;
+ if (worker_thread_count == 0) {
+ /* All the threads have exited, now finish the shutdown process
+ * by signalling the sigwait thread */
+ kill(server_pid, SIGTERM);
+ }
+ ap_unlock(worker_thread_count_mutex);
+
+ return (0);
+}
+
+static int make_worker(server_rec *s, int slot, time_t now)
+{
+ thread_id tid;
+ proc_info *my_info = (proc_info *)malloc(sizeof(proc_info));
+
+ if (my_info == NULL) {
+ ap_log_error(APLOG_MARK, APLOG_ALERT, errno, ap_server_conf,
+ "malloc: out of memory");
+ clean_child_exit(APEXIT_CHILDFATAL);
+ }
+
+ my_info->slot = slot;
+ ap_create_pool(&my_info->tpool, pchild);
+
+ if (slot + 1 > ap_max_child_assigned)
+ ap_max_child_assigned = slot + 1;
+
+ /* TODO: figure out the one_process stuff... */
+/*
+ if (one_process) {
+ set_signals();
+ ap_child_table[slot].pid = getpid();
+ ap_child_table[slot].status = SERVER_ALIVE;
+ }
+This is deliberate to remind me to do something about it!
+*/
+
+ tid = spawn_thread(worker_thread, "apache_worker", B_NORMAL_PRIORITY,
+ my_info);
+ if (tid < B_NO_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, errno, s,
+ "spawn_thread: Unable to start a new thread");
+ /* In case system resources are maxxed out, we don't want
+ * Apache running away with the CPU trying to fork over and
+ * over and over again. */
+ sleep(10);
+
+ return -1;
+ }
+ resume_thread(tid);
+
+ ap_child_table[slot].pid = getpid();
+ ap_child_table[slot].status = SERVER_ALIVE;
+ return 0;
+}
+
+/* start up a bunch of children */
+static void startup_threads(int number_to_start)
+{
+ int i;
+
+ for (i = 0; number_to_start && i < ap_thread_limit; ++i) {
+ if (ap_child_table[i].status != SERVER_DEAD) {
+ continue;
+ }
+ if (make_worker(ap_server_conf, i, 0) < 0) {
+ break;
+ }
+ --number_to_start;
+ }
+}
+
+
+/*
+ * spawn_rate is the number of children that will be spawned on the
+ * next maintenance cycle if there aren't enough idle servers. It is
+ * doubled up to MAX_SPAWN_RATE, and reset only when a cycle goes by
+ * without the need to spawn.
+ */
+static int spawn_rate = 1;
+#ifndef MAX_SPAWN_RATE
+#define MAX_SPAWN_RATE (32)
+#endif
+static int hold_off_on_exponential_spawning;
+
+static void perform_idle_server_maintenance(void)
+{
+ int i;
+ time_t now = 0;
+ int free_length;
+ int free_slots[MAX_SPAWN_RATE];
+ int last_non_dead;
+
+ /* initialize the free_list */
+ free_length = 0;
+
+ for (i = 0; i < ap_thread_limit; ++i) {
+ if (ap_child_table[i].status == SERVER_DEAD) {
+ if (free_length < spawn_rate) {
+ free_slots[free_length] = i;
+ ++free_length;
+ }
+ }
+ else {
+ last_non_dead = i;
+ }
+
+ if (i >= ap_max_child_assigned && free_length >= spawn_rate) {
+ break;
+ }
+ }
+ ap_max_child_assigned = last_non_dead + 1;
+
+ if (free_length > 0) {
+ for (i = 0; i < free_length; ++i) {
+ make_worker(ap_server_conf, free_slots[i], now);
+ }
+ /* the next time around we want to spawn twice as many if this
+ * wasn't good enough, but not if we've just done a graceful
+ */
+ if (hold_off_on_exponential_spawning) {
+ --hold_off_on_exponential_spawning;
+ } else if (spawn_rate < MAX_SPAWN_RATE) {
+ spawn_rate *= 2;
+ }
+ } else {
+ spawn_rate = 1;
+ }
+}
+
+static void server_main_loop(int remaining_threads_to_start)
+{
+ int child_slot;
+ ap_wait_t status;
+ ap_proc_t pid;
+ int i;
+
+ while (!restart_pending && !shutdown_pending) {
+ ap_wait_or_timeout(&status, &pid, pconf);
+
+ if (pid.pid >= 0) {
+ process_child_status(pid.pid, status);
+ /* non-fatal death... note that it's gone in the scoreboard. */
+ child_slot = -1;
+ for (i = 0; i < ap_max_child_assigned; ++i) {
+ if (ap_child_table[i].pid == pid.pid) {
+ int j;
+
+ child_slot = i;
+ for (j = 0; j < HARD_THREAD_LIMIT; j++) {
+ ap_beos_force_reset_connection_status(i * HARD_THREAD_LIMIT + j);
+ }
+ break;
+ }
+ }
+ if (child_slot >= 0) {
+ ap_child_table[child_slot].status = SERVER_DEAD;
+
+ if (remaining_threads_to_start
+ && child_slot < ap_thread_limit) {
+ /* we're still doing a 1-for-1 replacement of dead
+ * children with new children
+ */
+ make_worker(ap_server_conf, child_slot, time(NULL));
+ --remaining_threads_to_start;
+ }
+#ifdef APR_HAS_OTHER_CHILD
+ }
+ else if (ap_reap_other_child(&pid, status) == 0) {
+ /* handled */
+#endif
+ }
+ else if (is_graceful) {
+ /* Great, we've probably just lost a slot in the
+ * scoreboard. Somehow we don't know about this
+ * child.
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, errno, ap_server_conf,
+ "long lost child came home! (pid %ld)", pid.pid);
+ }
+
+ /* Don't perform idle maintenance when a child dies,
+ * only do it when there's a timeout. Remember only a
+ * finite number of children can die, and it's pretty
+ * pathological for a lot to die suddenly.
+ */
+ continue;
+ }
+ else if (remaining_threads_to_start) {
+ /* we hit a 1 second timeout in which none of the previous
+ * generation of children needed to be reaped... so assume
+ * they're all done, and pick up the slack if any is left.
+ */
+ startup_threads(remaining_threads_to_start);
+ remaining_threads_to_start = 0;
+ /* In any event we really shouldn't do the code below because
+ * few of the servers we just started are in the IDLE state
+ * yet, so we'd mistakenly create an extra server.
+ */
+ continue;
+ }
+
+ perform_idle_server_maintenance();
+ }
+}
+
+int ap_mpm_run(ap_pool_t *_pconf, ap_pool_t *plog, server_rec *s)
+{
+ int remaining_threads_to_start, i;
+ ap_status_t rv;
+ ap_listen_rec *lr;
+ pconf = _pconf;
+ ap_server_conf = s;
+
+ if ((num_listening_sockets = setup_listeners(ap_server_conf)) < 1) {
+ /* XXX: hey, what's the right way for the mpm to indicate a fatal error? */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, errno, s,
+ "no listening sockets available, shutting down");
+ return 1;
+ }
+
+ ap_log_pid(pconf, ap_pid_fname);
+
+ /*
+ * Create our locks...
+ */
+
+ /* accept_mutex
+ * used to lock around select so we only have one thread
+ * in select at a time
+ */
+ if ((rv = ap_create_lock(&accept_mutex, APR_MUTEX, APR_CROSS_PROCESS,
+ NULL, pconf)) != APR_SUCCESS) {
+ /* tsch tsch, can't have more than one thread in the accept loop
+ at a time so we need to fall on our sword... */
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+ "Couldn't create accept lock");
+ return 1;
+ }
+ /* worker_thread_count_mutex
+ * locks the worker_thread_count so we have ana ccurate count...
+ */
+ if ((rv = ap_create_lock(&worker_thread_count_mutex, APR_MUTEX, APR_CROSS_PROCESS,
+ NULL, pconf)) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+ "Couldn't create worker thread count lock");
+ return 1;
+ }
+
+ /*
+ * Startup/shutdown...
+ */
+
+ if (!is_graceful)
+ reinit_scoreboard(pconf);
+
+ set_signals();
+ /* Sanity cehcks to avoid thrashing... */
+ if (max_spare_threads < min_spare_threads )
+ max_spare_threads = min_spare_threads;
+
+ /* If we're doing a graceful_restart then we're going to see a lot
+ * of threads exiting immediately when we get into the main loop
+ * below (because we just sent them SIGWINCH). This happens pretty
+ * rapidly... and for each one that exits we'll start a new one until
+ * we reach at least threads_min_free. But we may be permitted to
+ * start more than that, so we'll just keep track of how many we're
+ * supposed to start up without the 1 second penalty between each fork.
+ */
+ remaining_threads_to_start = ap_threads_to_start;
+ /* sanity check on the number to start... */
+ if (remaining_threads_to_start > ap_thread_limit) {
+ remaining_threads_to_start = ap_thread_limit;
+ }
+
+ /* setup the child pool to use for the workers. Each worker creates
+ * a seperate pool of it's own to use.
+ */
+ ap_create_pool(&pchild, pconf);
+ ap_child_init_hook(pchild, ap_server_conf);
+
+ /* Now that we have the child pool (pchild) we can allocate
+ * the listenfds and creat the pollset...
+ */
+ listening_sockets = ap_palloc(pchild,
+ sizeof(*listening_sockets) * (num_listening_sockets));
+ for (lr = ap_listeners, i = 0; i < num_listening_sockets; lr = lr->next, ++i)
+ listening_sockets[i]=lr->sd;
+
+ /* we assume all goes OK...hmm might want to check that! */
+ if (!is_graceful) {
+ startup_threads(remaining_threads_to_start);
+ remaining_threads_to_start = 0;
+ }
+ else {
+ /* give the system some time to recover before kicking into
+ * exponential mode */
+ hold_off_on_exponential_spawning = 10;
+ }
+
+ /*
+ * record that we've entered the world !
+ */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf,
+ "%s configured -- resuming normal operations",
+ ap_get_server_version());
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, errno, ap_server_conf,
+ "Server built: %s", ap_get_server_built());
+ restart_pending = shutdown_pending = 0;
+
+ /*
+ * main_loop until it's all over
+ */
+ server_main_loop(remaining_threads_to_start);
+
+ /*
+ * If we get here we're shutting down...
+ */
+ if (shutdown_pending) {
+ /* Time to gracefully shut down:
+ * Kill child processes, tell them to call child_exit, etc...
+ */
+ if (beosd_killpg(getpgrp(), SIGTERM) < 0)
+ ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf,
+ "killpg SIGTERM");
+
+ /* cleanup pid file on normal shutdown */
+ {
+ const char *pidfile = NULL;
+ pidfile = ap_server_root_relative (pconf, ap_pid_fname);
+ if ( pidfile != NULL && unlink(pidfile) == 0)
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO,
+ errno, ap_server_conf,
+ "removed PID file %s (pid=%ld)",
+ pidfile, (long)getpid());
+ }
+
+ /* use ap_reclaim_child_processes starting with SIGTERM */
+ ap_reclaim_child_processes(1);
+
+ /* record the shutdown in the log */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf,
+ "caught SIGTERM, shutting down");
+
+ return 1;
+ }
+
+ /* we've been told to restart */
+ signal(SIGHUP, SIG_IGN);
+
+ if (one_process) {
+ return 1;
+ }
+
+ if (is_graceful) {
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf,
+ "SIGWINCH received. Doing graceful restart");
+ tell_workers_to_exit();
+ /* TODO - need to test some ideas here... */
+ }
+ else {
+ /* Kill 'em all. Since the child acts the same on the parents SIGTERM
+ * and a SIGHUP, we may as well use the same signal, because some user
+ * pthreads are stealing signals from us left and right.
+ */
+ push_workers_off_cliff(SIGTERM);
+
+ ap_reclaim_child_processes(1); /* Start with SIGTERM */
+ ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, errno, ap_server_conf,
+ "SIGHUP received. Attempting to restart");
+ }
+
+ if (!is_graceful) {
+ ap_restart_time = time(NULL);
+ }
+
+ return 0;
+}
+
+static void beos_pre_config(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp)
+{
+ static int restart_num = 0;
+
+ one_process = !!getenv("ONE_PROCESS");
+
+ /* sigh, want this only the second time around */
+ if (restart_num++ == 1) {
+ is_graceful = 0;
+ if (!one_process)
+ beosd_detach();
+ server_pid = getpid();
+ }
+
+ beosd_pre_config();
+ ap_listen_pre_config();
+ ap_threads_to_start = DEFAULT_START_THREADS;
+ min_spare_threads = DEFAULT_MIN_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ max_spare_threads = DEFAULT_MAX_FREE_DAEMON * DEFAULT_THREADS_PER_CHILD;
+ ap_thread_limit = HARD_SERVER_LIMIT;
+ ap_threads_per_child = DEFAULT_THREADS_PER_CHILD;
+ ap_pid_fname = DEFAULT_PIDLOG;
+ ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD;
+ ap_beos_set_maintain_connection_status(1);
+
+ ap_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+}
+
+static void beos_hooks(void)
+{
+ INIT_SIGLIST()
+ one_process = 0;
+
+ ap_hook_pre_config(beos_pre_config, NULL, NULL, AP_HOOK_MIDDLE);
+}
+
+
+static const char *set_pidfile(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ if (cmd->server->is_virtual) {
+ return "PidFile directive not allowed in <VirtualHost>";
+ }
+ ap_pid_fname = arg;
+ return NULL;
+}
+
+static const char *set_scoreboard(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_scoreboard_fname = arg;
+ return NULL;
+}
+
+static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_to_start = atoi(arg);
+ return NULL;
+}
+
+static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ min_spare_threads = atoi(arg);
+ if (min_spare_threads <= 0) {
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "WARNING: detected MinSpareThreads set to non-positive.");
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "Resetting to 1 to avoid almost certain Apache failure.");
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "Please read the documentation.");
+ min_spare_threads = 1;
+ }
+
+ return NULL;
+}
+
+static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ max_spare_threads = atoi(arg);
+ return NULL;
+}
+
+static const char *set_server_limit (cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_thread_limit = atoi(arg);
+ if (ap_thread_limit > HARD_SERVER_LIMIT) {
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "WARNING: MaxClients of %d exceeds compile time limit "
+ "of %d servers,", ap_thread_limit, HARD_SERVER_LIMIT);
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ " lowering MaxClients to %d. To increase, please "
+ "see the", HARD_SERVER_LIMIT);
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ " HARD_SERVER_LIMIT define in src/include/httpd.h.");
+ ap_thread_limit = HARD_SERVER_LIMIT;
+ }
+ else if (ap_thread_limit < 1) {
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "WARNING: Require MaxClients > 0, setting to 1");
+ ap_thread_limit = 1;
+ }
+ return NULL;
+}
+
+static const char *set_threads_per_child (cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_threads_per_child = atoi(arg);
+ if (ap_threads_per_child > HARD_THREAD_LIMIT) {
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "WARNING: ThreadsPerChild of %d exceeds compile time"
+ "limit of %d threads,\n", ap_threads_per_child,
+ HARD_THREAD_LIMIT);
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ " lowering ThreadsPerChild to %d. To increase, please"
+ "see the", HARD_THREAD_LIMIT);
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ " HARD_THREAD_LIMIT define in src/include/httpd.h.");
+ }
+ else if (ap_threads_per_child < 1) {
+ ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
+ "WARNING: Require ThreadsPerChild > 0, setting to 1");
+ ap_threads_per_child = 1;
+ }
+ return NULL;
+}
+
+static const char *set_max_requests(cmd_parms *cmd, void *dummy, char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_max_requests_per_child = atoi(arg);
+
+ return NULL;
+}
+
+static const char *set_maintain_connection_status(cmd_parms *cmd,
+ core_dir_config *d, int arg)
+{
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ ap_beos_set_maintain_connection_status(arg != 0);
+ return NULL;
+}
+
+static const char *set_coredumpdir (cmd_parms *cmd, void *dummy, char *arg)
+{
+ ap_finfo_t finfo;
+ const char *fname;
+ const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+ if (err != NULL) {
+ return err;
+ }
+
+ fname = ap_server_root_relative(cmd->pool, arg);
+ if ((ap_stat(&finfo, fname, cmd->pool) != APR_SUCCESS) ||
+ (finfo.filetype != APR_DIR)) {
+ return ap_pstrcat(cmd->pool, "CoreDumpDirectory ", fname,
+ " does not exist or is not a directory", NULL);
+ }
+ ap_cpystrn(ap_coredump_dir, fname, sizeof(ap_coredump_dir));
+ return NULL;
+}
+
+static const command_rec beos_cmds[] = {
+UNIX_DAEMON_COMMANDS
+LISTEN_COMMANDS
+{ "PidFile", set_pidfile, NULL, RSRC_CONF, TAKE1,
+ "A file for logging the server process ID"},
+{ "ScoreBoardFile", set_scoreboard, NULL, RSRC_CONF, TAKE1,
+ "A file for Apache to maintain runtime process management information"},
+{ "StartServers", set_daemons_to_start, NULL, RSRC_CONF, TAKE1,
+ "Number of child processes launched at server startup" },
+{ "MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF, TAKE1,
+ "Minimum number of idle children, to handle request spikes" },
+{ "MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of idle children" },
+{ "MaxClients", set_server_limit, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of children alive at the same time" },
+{ "ThreadsPerChild", set_threads_per_child, NULL, RSRC_CONF, TAKE1,
+ "Number of threads each child creates" },
+{ "MaxRequestsPerChild", set_max_requests, NULL, RSRC_CONF, TAKE1,
+ "Maximum number of requests a particular child serves before dying." },
+{ "ConnectionStatus", set_maintain_connection_status, NULL, RSRC_CONF, FLAG,
+ "Whether or not to maintain status information on current connections"},
+{ "CoreDumpDirectory", set_coredumpdir, NULL, RSRC_CONF, TAKE1,
+ "The location of the directory Apache changes to before dumping core" },
+{ NULL }
+};
+
+module MODULE_VAR_EXPORT mpm_beos_module = {
+ MPM20_MODULE_STUFF,
+ NULL, /* hook to run before apache parses args */
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ beos_cmds, /* command ap_table_t */
+ NULL, /* handlers */
+ beos_hooks /* register_hooks */
+};
+
projects / apache / commitdiff